Metal-rolling machine.



s. D. STURGI S.

METAL ROLLING MACHINE.

APPLICATION FILED 0014, 1911.

1,062,807. Patented May 27, 1913.

v F/ 7 7 2 m I! w /Z' I Z Inventor. Jamuel D. r9019 witnesses. 7 Y

I Bib -gs UNITED STATES PATENT OFFICE. 2

sa vmnn n. STURGIS, or Los ntennas, cA IFoaiv A.

METAL-ROLLING MACHINE.

To all whom it may concern:

Be it known that I, SAMUEL D. Srnneis, a citizen of the United States, residing at Los Angeles, in the county of'Los Angeles" and State of California, haveinvented new and useful Improvements in Metal-Rolling Machines, of which the following is a specification.

This invention relates to improvements in metal rolling machines, and it is an object of the invention to provide machine for rolling metal pieces to a tapered form without spreading the same to a greater width.

It is also an object of the invention to provide a machine with metal shaping rolls adapted to taper strips of metal without increasing the width thereof, the relative action of the rolls being capable of accom plishing this purpose. p

In the accompanying drawing forming a part of this specification, Figure 1 is a side elevation of the rolling machine embodying the feature of the present invention. Fig. 2 is a front elevation of the same; Fig. 3 is an enlarged detail sectional view taken transversely through the rolls of the device. Fig. 4 is a detail perspective view of the tapered end of a vehicle spring which has been rolled in the machine.

The details of the invention will now be more particularly described, reference being had to the drawing in which 5 indicates aframe having upright standards 6 and 7 mounted thereon and between which upper and lower metal shaping rolls 8 and 9 are mounted. The rolls are provided with journals engaging any suitable bearings secured in the said frame 6 and 7 The shafts of each roll project beyond the journal portions thereof and are provided with gears 10 and 11 which are arranged to intermesh so that the rolls always turn in a given relation to each other. While intermeshing rolls 10 and 11 upon one side of the machine will be suflicient to accomplish the desired purpose, yet a stronger and more even result is obtained by employing rolls 10 and 11 at both ends of the shafts as shown in Fig. 2. Any desired means for operating the metal shaping rolls through theagencies of said gears may be employed within the spirit of the invention. One practical form has been shown in the drawing which consists of large gears 12 applied to the ends of the lower roll shaft 13. The said gears 12 on each side of the maspecification of Letters Patent.

Application filed October 4, 1911.

Ser'ia1N0. 652,805.

Patented May 27 1913.

chine mesh with actuating'pinions l4 mounted upon a transverse shaft 15 which is j ournaled upon a portion of the framing 5.

Any suitable mechanism may be employed for rotating the shaft 15 and thus imparting movement to the gearing described and to the shaping rolls 8 and 9. p I

feature of the invention It is an important that one roll shall havea different action and effect upon the metal to 'be rolled or shaped from the other roll and the result desired in tapering a metallic spring or other piece of metal without flaring it, is best obtained by making the roll 8 cylindrical,

while the roll 9 is of a cam shape, its surface following spiral lines in cross section,"

whereby an eccentric surface is afforded the roll, preferably like that shown in Fig. 3

of the drawing.

To attain the best result the shortest ra dius of the cam roll should be equal to the radius of the cylindrical roll. As the rolls rotate in unison, the action upon one side of the metal by the roll 8 is different from that of roll 9 upon the lower side of the or pull the hull: of the metal toward the end of the piece as thespiralmcreases upon said roll and as its surface draws nearer to the surface of the roll 8.

It is found in practice that an eccentric or cam shapedroll as shown, when operating in conjunction with a cylindrical roll will taper a metallic bar, such forinstance metal, the said latter roll operating to force? as is generally used in making vehicle of which is equal to the radius ofan opposing cylindrical roll, the enlarging portion'of the cam roll engaging the metal operates to draw the metal lengthwise of a spring in stead of spreading it laterally.

It will be observed by reference to Fig. 3

that the metal upon the underside of the spring is forced forward in the form of a thickened or bulged portionwhich will be carried clear to the end of the spring without the spring broadening. There is usually a slight bulged end left upon the springthe springs, as soon as the thickest portion of the roll 9 as indicated at 16, passes the point of nearest approach to the roll 8, a bar of metal to be rolled can be thrust between the rolls until it engages a stop 17 secured upon the standards 6 and 7. The con' tinued rotation of the shaping rolls 8 and 9 will then return the bar toward the front of the machine tapering and drawing the metal toward the point or sharpened end thereof. i

In order to properly and positively space the shaping rolls 8 and 9 with respect to each other, one roll as 8 is provided with end annular flanges 18 which engage and roll upon cylindrical portions 19 formed at the ends of the eccentric roll 9. The space between the rolls just to one side and off of the thickened portion of the eccentric roll 9. will be the full depth of the annular flanges 18, but the said space will gradually dimin ish as the rolls turn so as to act upon the metal placed between them and gradually taper it.

It will be understood that metal pieces or strips of different widths may be acted upon in exactly the same manner as described. with respect to the narrow pieces or strips intended for vehicle springs. The action of the rolls with respect to each other can be somewhat varied by changing their dimensions and also by changing the size of the intermeshing gears 10 and 11 with respect to each other. The best result for rolling springs without flaring them is obtained when the shortest radius of the eccentric roll 9 is equal to the radius of the cylindrical roll 8. By causing the eccentric roll 9 to move some what faster than the roll 8, the material of the piece rolled may be drawn outwardly by the eccentric roll so as to even taper the same in width as well as inthickness, or the said roll 9 may be made to go slightly slower than the roll 8 so as to permit a slight flaring of the end of the strip rolled if preferred. Usually when the gears are made of the same size and the shape 01" the rolls is approximately that shown in the drawing, the strip of metal will be tapered in thickness without changing its width.

hat I claim is A, mechanism for rolling metal, comprising a cylindrical roll, and a roll having a spiral cross sectional shape the shortest radius of which is equal the radius of the cylindrical roll.

In witness that I claim the foregoing I have hereunto subscribed my name this 26th day of Sept, 1911. V

SAMUEL D. STURGIS.

Witnesses:

E. STADLMAN, EARLE R. POLLARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

